问题
选择题
They didn't go to bed_____ the work was finished.
A．when
B．while
C．until
D．after
答案
答案：C
考查固定用法“直到---才---” not--- until---
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They didn't go to bed_____ the work was finished.
A．when
B．while
C．until
D．after
答案：C
考查固定用法“直到---才---” not--- until---